JPH01103414A - Molding method of cylindrical molded product - Google Patents
Molding method of cylindrical molded productInfo
- Publication number
- JPH01103414A JPH01103414A JP26184587A JP26184587A JPH01103414A JP H01103414 A JPH01103414 A JP H01103414A JP 26184587 A JP26184587 A JP 26184587A JP 26184587 A JP26184587 A JP 26184587A JP H01103414 A JPH01103414 A JP H01103414A
- Authority
- JP
- Japan
- Prior art keywords
- lining
- temperature
- core mold
- mold
- molded product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000000465 moulding Methods 0.000 title claims description 12
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052731 fluorine Inorganic materials 0.000 abstract 1
- 239000011737 fluorine Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
- B29C45/14622—Lining the inner or outer surface of tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
- B29C2045/14877—Pretreatment of the insert, e.g. etching, cleaning preheating or precooling the insert for non-deforming purposes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ライニングを有する円筒状成形品の成形方法
に関し、インサートとしてコア金型に取付けられたライ
ニングが変形したり、パリが発生したりするのを防止す
ることを目的とする。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for molding a cylindrical molded product having a lining, and is a method for molding a cylindrical molded product that is attached to a core mold as an insert, and prevents the lining from being deformed or causing cracks. The purpose is to prevent
ライニングを有する成形品においては、ライニングは可
撓性の材料により構成されている。In a molded article having a lining, the lining is made of a flexible material.
このような成形品を成形する場合、予めライニングを成
形しておき、これをインサートとし、成形品本体を成形
するという方法がしばしば行われている。When molding such a molded product, a method is often used in which a lining is molded in advance, this is used as an insert, and the main body of the molded product is molded.
円筒状の成形品では、ライニングをコア金型に予めセッ
トして成形する。For cylindrical molded products, the lining is set in advance in a core mold and molded.
ライニングの材料として弗素樹脂のものがしばしば使用
される。弗素樹脂系ライニングは可撓性方法で成形する
場合、成形特金型温度にまで加熱されると、膨張して金
型との間に隙間ができ、その隙間に樹脂が入りこみ、パ
リを発生させたり、ライニングが変形したりする。Fluororesin is often used as the lining material. When a fluororesin lining is molded using a flexible method, when it is heated to the temperature of a special mold, it expands and creates a gap between it and the mold, and the resin gets into that gap, causing paris. or the lining may become deformed.
このよう、な欠点のない成形方法は未だ見出されていな
い。A molding method free of such drawbacks has not yet been found.
本発明はライニングをインサートとする円筒状成形品の
成形において、パリの発生やライニングの変形という欠
点のない成形方法を提供することを目的とする。An object of the present invention is to provide a method for molding a cylindrical molded product using a lining as an insert, which is free from the drawbacks of occurrence of flashing and deformation of the lining.
本発明は、弗素樹脂系ライニングを有する円筒状成形品
の成形方法において、所定の金型成形温度においては、
コア金型の外径より若干小さい内径のライニングを、予
めコア金型温度より高温に予熱することによりライニン
グの内径をコア金型の径より大きくしてコア金型にセッ
トし、その後、＼
樹！旨により成形品本体を成形することを特徴とする′
円筒状成形品の成形方法に関するものである。The present invention provides a method for molding a cylindrical molded product having a fluororesin lining, at a predetermined molding temperature.
A lining with an inner diameter slightly smaller than the outer diameter of the core mold is preheated to a temperature higher than the core mold temperature to make the inner diameter of the lining larger than the diameter of the core mold, and then set in the core mold. ! The main body of the molded product is molded according to the purpose.
The present invention relates to a method for forming a cylindrical molded product.
本発明において、金型温度は、成形される樹脂によるが
、１４０〜１６０℃程度である。弗素樹脂系ライニング
はそれより高い温度、通常２０℃程度高い温度に加熱さ
れるので、その温度は１６０〜１８０℃である。従って
、ライニング材料はかなり耐熱性のあるもの、例えば、
ＴＦＥ樹脂、ＤＦＡ樹脂、ＦＥＰ樹脂等が好ましい、ラ
イニングの形状は、前記金型温度においては、ライニン
グがセットされるコア金型の外径より若干小さい円径と
する。In the present invention, the mold temperature is approximately 140 to 160°C, depending on the resin to be molded. Since the fluororesin lining is heated to a higher temperature, usually about 20°C, the temperature is 160 to 180°C. Therefore, the lining material should be fairly heat resistant, e.g.
The lining, which is preferably made of TFE resin, DFA resin, FEP resin, etc., has a circular diameter that is slightly smaller than the outer diameter of the core mold in which the lining is set at the mold temperature.
そしてこのライニングを前記金型温度より高い温度にま
で加熱することにより、その内径をコア金型の外径より
若干大きく膨張させる。この状態でコア金型にセットす
る。By heating this lining to a temperature higher than the mold temperature, its inner diameter is expanded to be slightly larger than the outer diameter of the core mold. In this state, set it in the core mold.
コア金型にセントされたライニングは、その温度が金型
温度にまで低下するので、収縮し、コア金型に密着する
。The temperature of the lining placed in the core mold decreases to the mold temperature, so that it contracts and tightly adheres to the core mold.
しかる後樹脂を投入して、円筒状成形品を成形本発明は
、テフロン等のライニング材の熱膨張係数が金型よりか
なり大きいことを利用したもので、ライニングをコア金
型に密着することができるので、ライニングとコア金型
との間に樹脂のバひ
すが発生するのを防止することができ、榊いては、ライ
ニングの変形をも防止できる。従って、ライニングを有
する円筒状の成形品を、成形不良を起すことなく成形す
ることができる。After that, resin is added and a cylindrical molded product is formed.The present invention takes advantage of the fact that the coefficient of thermal expansion of the lining material such as Teflon is considerably larger than that of the mold, making it possible to tightly adhere the lining to the core mold. Therefore, it is possible to prevent resin cracks from forming between the lining and the core mold, and in turn, it is possible to prevent deformation of the lining. Therefore, a cylindrical molded product having a lining can be molded without causing molding defects.
Claims (1)
において、所定の金型成形温度においては、コア金型の
外径より若干小さい内径のライニングを、予めコア金型
温度より高温に予熱することによりライニングの内径を
コア金型の径より大きくしてコア金型にセットし、その
後、樹脂により成形品本体を成形することを特徴とする
円筒状成形品の成形方法。In a method for molding a cylindrical molded product having a fluororesin lining, at a predetermined molding temperature, the lining, which has an inner diameter slightly smaller than the outer diameter of the core mold, is preheated to a higher temperature than the core mold temperature. A method for molding a cylindrical molded product, characterized in that the inner diameter of the lining is made larger than the diameter of the core mold, the lining is set in the core mold, and then the main body of the molded product is molded with resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26184587A JPH01103414A (en) | 1987-10-19 | 1987-10-19 | Molding method of cylindrical molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26184587A JPH01103414A (en) | 1987-10-19 | 1987-10-19 | Molding method of cylindrical molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01103414A true JPH01103414A (en) | 1989-04-20 |
| JPH0329573B2 JPH0329573B2 (en) | 1991-04-24 |
Family
ID=17367546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26184587A Granted JPH01103414A (en) | 1987-10-19 | 1987-10-19 | Molding method of cylindrical molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01103414A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5232752B2 (en) | 2009-09-30 | 2013-07-10 | 本田技研工業株式会社 | Arrangement structure of evaporative fuel treatment system for saddle-ride type vehicle |
-
1987
- 1987-10-19 JP JP26184587A patent/JPH01103414A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0329573B2 (en) | 1991-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR840004379A (en) | Manufacturing method and apparatus of hollow product | |
| US4264661A (en) | Thermoplastic article and process for manufacture of same | |
| US4318683A (en) | Apparatus for molding indicia in roto-molded plastic containers | |
| US3649409A (en) | Process for lining a plastic cylinder with another plastic | |
| JPH01103414A (en) | Molding method of cylindrical molded product | |
| US4342716A (en) | Method and apparatus for molding indicia in roto-molded plastic containers | |
| US2893060A (en) | Joint rings | |
| ATE112704T1 (en) | PROCESS FOR MANUFACTURE OF COMPOSITE PIPES. | |
| NO870796D0 (en) | PROCEDURE FOR THE PREPARATION OF A COMPOSITE ROOM AND APPARATUS FOR PREPARING THIS. | |
| PT1112170E (en) | METHOD FOR MANUFACTURING PRESSURE COMPOSITIONS AND PRODUCTS MANUFACTURED BY THAT PROCESS | |
| US2945264A (en) | Method for producing massive solid homogeneous bodies of polyethylene having a thickness of the order of several inches | |
| JPS5854973B2 (en) | Magarikannoburo - Seikeihou | |
| JPS57115938A (en) | Method for manufacturing molding sand coated with unsaturated polyester resin | |
| JPS62144913A (en) | Molding device for powder slush | |
| JPS5695647A (en) | Production of thermal shrinkage tube | |
| JPH04347012A (en) | Bearing | |
| JPS6233060B2 (en) | ||
| JPS59123621A (en) | Method for lining | |
| SE425440B (en) | MIRROR SUBJECT MATERIAL PROCEDURE AND MEANS OF ITS PREPARATION | |
| GB880059A (en) | Fabrication of thermoplastic resins | |
| JPH01156037A (en) | Manufacture of polytetrafluoroethylene vessel | |
| SU412007A1 (en) | ||
| US3832257A (en) | Method of coating photoflash lamp | |
| JPS56139917A (en) | Manufacture of synthetic resin product | |
| JPS63242609A (en) | Rotational molding of fluoroplastic |